China's satellite sends unbreakable cipher from space

Added On August 11, 2017

Chinese scientists have become the first to realize quantum key distribution from a satellite to the ground.

It lays the foundation for building a hack-proof global quantum communication network.
The achievement was based on experiments conducted with the world's first quantum satellite, Quantum Experiments at Space Scale.
It was published in the authoritative academic journal Nature on Thursday.
The Nature reviewers commented that the experiment was an impressive achievement, and constituted a milestone in the field.
Nicknamed "Micius", the 600-kilogram-plus satellite was sent into a sun-synchronous orbit at an altitude of 500 kilometers on August 16, 2016.
The satellite sent quantum keys to ground stations in Xinglong, in north China's Hebei Province, and Nanshan, near Urumqi, capital of northwest China's Xinjiang Uygur Autonomous Region.
Scientists say the establishment of a reliable and efficient space-to-ground link for faithful quantum state transmission paves the way to global-scale quantum networks.
Scientists expect quantum communications to fundamentally change human development in the next two or three decades, as there are enormous prospects for applying the new generation of communication in fields like defense, military and finance.